Files

T

lzrdblzzrd 565b751195 Rewrite game mode: two-pass scan, priority restoration, LimitedInformation access

- Use PROCESS_QUERY_LIMITED_INFORMATION instead of PROCESS_QUERY_INFORMATION
  to open processes (fixes Access Denied for KeePassXC, HD-Player, etc.)
- Separate query handle from set handle: trySetPrio reopens with
  PROCESS_SET_INFORMATION only when needed
- Two-pass scan: pass 1 collects RSS and detects game processes,
  pass 2 applies priorities with correct hasGame state
- Game mode saves original priorities in gameSaved map, restores them
  on GAME MODE OFF (not just NORMAL)
- Demote ALL non-game processes to IDLE in game mode (not just promoted)
- 50ms delay between priority changes for smooth transitions
- Replace isAlive/procName with pidMap from allProcs snapshot
- Replace mutex/MessageBox single-instance with killOtherInstances
- Defaults: -mem=512M, -game-mem=4G
- Fix double CloseHandle and handle leak in trySetPrio
- Update README with new defaults and game mode restoration behavior

2026-06-22 17:24:21 +03:00

3.5 KiB

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autoPriority

Monitors process memory usage on Windows and automatically adjusts CPU priority: promotes memory-heavy processes to HIGH and demotes everything else to NORMAL. Optionally enters Game Mode when a process exceeds a higher threshold, boosting it to HIGH and setting all other processes to IDLE.

Windows only.

How it works

Normal mode

Every scan interval the program iterates over all running processes:

RSS vs `-mem`	Current priority	Action
≥ threshold	anything except HIGH	→ HIGH (logged as `PROMOTE`)
≥ threshold	already HIGH	skip
< threshold	ABOVE_NORMAL, HIGH, or REALTIME	→ NORMAL (logged as `DEMOTE`)
< threshold	NORMAL, BELOW_NORMAL, or IDLE	skip

Game mode (`-game-mem`)

When any process reaches or exceeds the -game-mem threshold:

That process → HIGH (logged as GAME)
All other processes → IDLE
Log: GAME MODE ON

When all such processes close:

All processes that were demoted during game mode are restored to their original priority (logged as RESTORE)
GAME MODE OFF logged
Normal mode resumes — priorities recalculated by -mem rules

If SetPriorityClass or OpenProcess fails for a process (e.g., anti-cheat protection, system processes), the process is added to an in-memory exclusion list and never touched again (logged as BLOCK). When the process exits, it is automatically removed from the list.

On shutdown, all processes are restored: game-mode demoted processes to their saved original priority, promoted and game processes to NORMAL.

Build

Requires Go 1.26+.

# Standard build (with console window)
go build -o autopriority.exe .

# Background build (no console, minimal size)
go build -ldflags="-H windowsgui -s -w" -o autopriority.exe .

Usage

autopriority [flags]

Flag	Default	Description
`-mem`	512M	Memory threshold (e.g. 512M, 1G, 2048M)
`-game-mem`	4G	Game threshold (e.g. 3G, 4G). Must be > `-mem`. 0 = disabled
`-interval`	1 minute	Scan interval (min 10s)
`-dry-run`	false	Log only, don't change priority

Examples:

# Run with 1 GB threshold, scanning every 30 seconds
autopriority -mem=1G -interval=30s

# Run with defaults (512M threshold, 4G game threshold)
autopriority

# Game mode: normal threshold 512M, game threshold 4G
autopriority -mem=512M -game-mem=4G

# Dry run — log decisions without changing anything
autopriority -dry-run

Log

Log is always written to %TEMP%\autopriority.log. A new log file is created on each run (previous log is deleted).

Log entries:

Prefix	Meaning
`PROMOTE`	Priority raised to HIGH (normal mode)
`DEMOTE`	Priority lowered to NORMAL (normal mode)
`GAME`	Process set to HIGH or IDLE (game mode)
`GAME MODE ON`	Game mode activated
`GAME MODE OFF`	Game mode deactivated — processes restored
`BLOCK`	OpenProcess or SetPriorityClass failed; process added to exclusion list
`RESTORE`	Process restored to original/saved priority (game mode exit or shutdown)
`SKIP RESTORE`	PID reused by a different process; restore skipped
`[DRY-RUN]`	Would change priority (dry-run mode)

Auto-start

Open Win+R, type shell:startup, and press Enter. Then place a shortcut to autopriority.exe in the folder that opens.

Dependencies

None. Uses only Windows API (kernel32, psapi) via raw syscall.

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